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GPU-version of Gaussian Blur sometimes produces visible ringing artifacts on high contrast images

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Hi,

 

I noticed some annoying ringing artifacts in my footage after applying the GaussianBlur() from the PrSDKGPUImageProcessingSuite.

 

I assume the blur implementation is the same as in the 'Gaussian Blur' Video Effect. So I tested with that effect standalone and was able reproduce the problem.

The ringing artifacts appear in high contrasted footage (see screenshots) and only with the GPU-version of the blur.

Switching to software-only renderer and therefore enforcing the CPU-version of the effect removes the artifacts.

 

Has anybody already noticed this issue?

 

Regards,

Philipp

 

 

Gaussian Blur (CPU) without artifacts:

Adobe_Gaussian_Artifacts_CPU.PNG

 

Gaussian Blur (GPU) with artifacts:

Adobe_Gaussian_Artifacts_GPU.PNG


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